Pulverizing machine



Feb. 25, 1930. E. H. ELZEMEYER -PULVERIZING MACHINE Filed ont. 9, 1925 Patented Feb. Z5, l1930 l chines of thetype wherein avrotor loosely` UNITED STATES PATENT oFFicE A ERNST H. ELZEMEYER, OF ST. LOUIS, MISSOURI, ASSIGNOR T AMERICAN PULVERIZER COMPANY, OF'S'I. LOUIS, MISSOURI, A `C!)BJ?Olhlflll' OF MISSOURI IPULVERIZING MACHINE Application mea october 9, 1925.y serial` no; 61,562.kv I

This invention relates to pulverizing masupports a series of annularly spaced rings adapted to cooperate withthe grinding surfaces of the pulverizing machine.

vThe principal object of the present invention is an improved ring for pulverizers of the above type that will overcome the tend- Y ency for the material to pack on the grinding surface of the pulverizer under the rolling Aaction of said ring, and thereby increase theefliclency of such machine. Other objects are simplicity and cheapness of construction and compactness of design;

The invention consists principally in a pulverizing ring whose peripheral surface is formed with reversely-curved or undulating side edges; and it also consists in the;

parts and in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification, and wherein likey In Fig. 1 of the accompanying drawing,

ymy invention is illustrated in connection with apulverizer comprising a suitable casing or housing l provided with a hopper or chute 5 through which the material to bey pulverized is fed. The `main shaft 6 is mounted in bearings formed in the end walls of the casing, said end walls being provided ends of the grinding concave 8 and the grate vwith arcuate flanges 7 which support the hars 9. Mounted on the shaft 6 in recesses provided therefor in the end walls of the casing, are end plates or disks 10. These disksfare keyed to the shaft 6 so as to be rigid therewith, and are connected to each other k nearrtheir outer edges by a series of spaced parallel rods 11.

Mounted on the shaft 6 'between the disks 10 are spiders 12, the radially extending arms 13 of which are perforated to receive the supporting rods 11 and d l thus form supports forrthe same intermediate their ends., The hub portions 14 of the spiders 12 are keyed to the shaft 6 and abut against each other,-thereby spacing the arms 13 ofy the lspiders the desired distance from each other.

'revolve with the carrier and act 'as percussion members to break or shatter the pieces of material and they also cooperate with the grinding surfaces and act as rollers to crush or pulverize the material over which they roll or ride. Eachof the ringsA comprises an annular body portion having a smooth uninterrupted peripheral surface whose side edges 15' are shaped in waves or undulations; that is, each edge of the peripheral surface of a ring'is alternately concave and convex, the convex portion at one edge of said ring being disposed opposite the concave portion at the other edge of said ring. In order that the rings A shall have sufficient weight to serve as crushing rollers, the annular body portions of said rings are made wider than their peripheral portions except at the concave portions of the rings where said portions extend inwardly from the peripheral surface of the rings to form a series of annularly spaced recesses 16 in the peripheral porti-on of each of their side faces. These recesses terminate short of the inner periphery of the ring and their bottoms are reversely curved after the manner of their sides so 'that said recesses are deepest at their middle and merge into the peripheral surface of the ring attheir ends. f

of October, 1925.

vide additional cutting edges which serve to hack or cut the material.

The foregoing arrangement is considered only as an example; therefore, I do not Wish to be limited to the type of machine. shown, as my invention is applicable to other typesof pulverizers.

What I claim is:

l. A ring for pulverizing machines comprising an annular body having a series ofY circumferentially spaced recesses formed in the peripheral portion of each of its side faces, the end portions of said recesses terminating in curved surfaces that are tangent to the peripheral surface of said ring.

2; A ring for pulverizing machines comprising an annular body having undulating side faces and a series of circumferentially spaced recesses formed in the peripheral portion of each of its side faces, the bottom of each recess being reversely curved from the middle of said recess to the ends thereof.y

3. A ring for pulverizing' machines comrisino' an annular bod havin@ Aa series of circumferentially spaced recesses formed in the peripheral portion of each` of its sideV faces, the recesses on one side of said body being disposed opposite the spaces between the recesses on the other side of said body, the bottoms of said recesses being reverselyy curved from their middle to their ends,

4. A ring for pulverzing machines comprising an annular body provided at the peripheral portion of each of its side faces with recesses', Whose sides and bottoms are reversely curved and merge into the sides and peripheral face of said body at the ends of said recesses.

5. A ring for pulverizing machines comprising an annular body having a series of circumferentially spaced recesses in its peripheral edges, said recesses being of gradually decreasing depth and Width from their middle towards their ends, Where they terminate in curved surfaces that are tangent to the sides and peripheral surfaces of said ring.

6. A ring for pulverizing machines comprising an annular body having a series of circumferentially spaced recesses in the marginal portions of its peripheral surface, the

bottoms of said recesses extending circum- Y ferentially of said ring and the peripheries of said bottoms being reversely curved from their middle to their ends.

Signed at St. Louis, Missouri, this 5th day ERNST H. ELZEMEYER. 

